G3512 750KW

Caterpillar is leading the power generation marketplace with Power Solutions engineered to deliver unmatched flexibility, expandability, reliability, and cost-effectiveness.

Gas Generator Sets Specification
Gas Standby Rating 750kW
Fuel Type Natural Gas
Frequency 60Hz
RPM 1800rpm
Compression Ratio 9.7
Displacement 3173 in³

Engine Specifications
Aspiration TA
Bore 6.7 in
Displacement 3173 in³
Engine Model G3512
Stroke 7.5 in

Generator Set Dimensions
Length 205.7 in
Width 90 in
Height 99.4 in
Weight 27500 lb

Generator Set Configurations
Emissions/Fuel Strategy U.S. EPA Stationary Emergency Certified

Cat Engine

· Robust high speed block design provides prolonged life and lower owning and operating costs
· Designed for maximum performance on low pressure gaseous fuel supply
· Simple open chamber combustion system for reliability and fuel flexibility


· Matched to the performance and output characteristics of engine
· Industry-leading mechanical and electrical design
· Industry-leading motor starting capabilities

Cat EMCP Control Panel

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP 4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP 4 systems can be further customized to meet your needs through programming and expansion modules.

Design Criteria

  • Per NFPA 110 Level 1 Type 10 the generator set is able to start and be ready to accept load within 10 seconds
  • The generator set is capable of accepting 100% rated load in a single step
  • The generator set meets Class G2 ISO 8528-5 transient response for a 30% load step
  • Cooling system designed to operate in 45˚C/113˚F ambient temperatures with an air flow restriction of 0.5 in. water without derate


  • EPA - S.I. Stationary Emergency
  • UL 2200 Listed
  • CSA Certified
  • Certain restrictions may apply
  • Consult with your Cat dealer

Full range of attachments

·   Wide range of bolt-on system expansion attachments, factory designed and tested
·   Flexible packaging options for easy and cost effective installation

World Wide Product Support

Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Cat® S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

Proven system

·   Fully prototype tested
·   Field proven in a wide range of applications worldwide
·   Certified torsional vibration analysis available


For all your gas power requirements, visit www.catgaspower.com

Standard Equipment

Air Inlet
  • Dual air cleaners, 1 per side, with service indicator
  • Engine driven pumps for jacket water and separate circuit aftercooler
  • Inboard Exhaust manifolds
  • Gas Train: NFPA37 and CSA B149.3
  • 0.5 to 5 psi engine fuel inlet pressure
  • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
  • NOx sensor based air-fuel-ratio control
  • Fuel Safeties, “Energize to Run” (ETR) Gas Shutoff Valve (GSOV)
  • Matched to the performance and output characteristics of Cat engines
  • SR5 Generators include:
  • Gear type lube oil pump
  • Cartridge style oil filter
  • Integral lube oil cooler
  • Steel base- engine/generator/radiator mounting
  • Anti-vibration mounts available for isolation efficiencies above 95%
  • 24V DC starting motors
  • Batteries with rack and cables
  • Battery disconnect switch
  • Jacket Water Coolant Heaters: 208/240/480V, 60Hz, 9/12 kw, UL Listed
  • ADEM A4 speed governor with 4 to 20ma (0V to 5V) speed input
Control Panel
  • EMCP 4.3 Genset Controller
  • Electronic Ignition System (controlled by ADEM A4)
  • Individual cylinder Detonation Sensitive Timing
  • Paint -- Caterpillar Yellow except rails & radiators
  • Crankshaft vibration damper
  • Lifting eyes
  • Operation and Maintenance Manuals; Parts Book

Optional Equipment

  • Exhaust Mufflers
  • Elbows, flanges, and flexible fittings
  • Voltages Available: 440/480/600/2400/4160
  • Random and Form wound available
  • Space Heater – 240V
  • Stator and bearing temperature monitoring and protection
Power Terminations
  • LH/RH/Rear Busbar connections
  • Top/Bottom Cable Entry
  • Circuit Breakers
Lube System
  • Lubricating oil
  • Oil Level Regulator
  • Sump Pump
Control System
  • Generator temperature monitoring & protection
  • Load share module
  • Annunciators
  • Starters: Either 2 or 3 electric starters available
  • Battery Chargers: 20, 35, or 50 AMP
  • Charging alternator, 45 AMP
  • Batteries (w/ rack and cables)
  • Electric Prelube Pump (AC)
  • Low efficiency (90%), rubber puck isolators
  • High efficiency (95%), spring isolators
  • Seismic isolators, rated to 1.5G
Cooling System
  • Package Mounted Radiator, sized for 45C/113F ambient to 300m/660ft
  • Low coolant level sensors (w/ radiator)
  • Jacket Water out: LH/RH, flanged or hose
  • The following options are based on regional and product configuration:

Feel free to ask a question or share a comment about the information on this page.

To help us answer your question or respond to your comment, please enter your email address.